Knife blade



FIG. 1 is a right side elevational view of a knife blade, showing my new design, the left side elevational view being a mirror image thereof;

FIG. 2 is a bottom plan view showing the bottom edge thereof;

FIG. 3 is a top plan view showing the top edge thereof;

FIG. 4 is an end view showing the tang end thereof;

FIG. 5 is an end view showing the point end thereof; and,

FIG. 6 is a top perspective view thereof.

The broken lines shown in the Figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a knife blade, as shown and described. 